<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        .wrap {
            width: 300px;
            margin: 100px auto 0;
        }

        table {
            border-collapse: collapse;
            border-spacing: 0;
            border: 1px solid #c0c0c0;
        }

        th,
        td {
            border: 1px solid #d0d0d0;
            color: #404060;
            padding: 10px;
        }

        th {
            background-color: #09c;
            font: bold 16px "微软雅黑";
            color: #fff;
        }

        td {
            font: 14px "微软雅黑";
        }

        tbody tr {
            background-color: #f0f0f0;
        }

        tbody tr:hover {
            cursor: pointer;
            background-color: #fafafa;
        }
    </style>
    <script src="jquery-1.12.2.js"></script>
    <script>
        $(function () {
           $("#j_cbAll").click(function () {
              var cked= $(this).prop("checked");
               $("#j_tb").find(":checkbox").prop("checked",cked);
           });
               $("#j_tb").find(":checkbox").click(function () {
                   var length1=$("#j_tb").find(":checkbox").length;
                   var length2=$("#j_tb").find("checked").length;

                   if(length1==length2){
                       $("#j_cbAll").prop("checked",true);
                   }else{
                       $("#j_cbAll").prop("checked",false);
                   }
               })

        });
    </script>
</head>
<body>
<div class="wrap">
    <table>
        <thead>
        <tr>
            <th>
                <input type="checkbox" id="j_cbAll" />
            </th>
            <th>课程名称</th>
            <th>所属学院</th>
        </tr>
        </thead>
        <tbody id="j_tb">
        <tr>
            <td>
                <input type="checkbox" />
            </td>
            <td>JavaScript</td>
            <td>前端与移动开发学院</td>
        </tr>
        <tr>
            <td>
                <input type="checkbox" />
            </td>
            <td>css</td>
            <td>前端与移动开发学院</td>
        </tr>
        <tr>
            <td>
                <input type="checkbox" />
            </td>
            <td>html</td>
            <td>前端与移动开发学院</td>
        </tr>
        <tr>
            <td>
                <input type="checkbox" />
            </td>
            <td>jQuery</td>
            <td>前端与移动开发学院</td>
        </tr>
        <!--<tr>
            <td><input type="checkbox"/></td>
            <td>HTML5</td>
            <td>前端与移动开发学院</td>
        </tr>
        <tr>
            <td><input type="checkbox"/></td>
            <td>CSS3</td>
            <td>前端与移动开发学院</td>
        </tr>-->
        </tbody>
    </table>
</div>
</body>
</html>